Some famous (ish?) modified versions of Chopin's Etudes were written by Godowsky. His mission appears to have been to make Chopin's hardest pieces just a bit ha

Some famous (ish?) modified versions of Chopin's Etudes were written by Godowsky. His mission appears to have been to make Chopin's hardest pieces just a bit harder, including the Revolutionary for the left hand only: https://youtu.be/X2nMUwdh1Wk?t=2m41s https://youtu.be/X2nMUwdh1Wk?t=2m41s